If you use a program like our minimal ESP32 wifi example:
#include <Arduino.h>
#include <WiFi.h>
void setup() {
Serial.begin(115200);
WiFi.begin("MyWifiNetworkName", "MyWifiPassword");
while (WiFi.status() != WL_CONNECTED) {
Serial.println("Wifi connecting...");
delay(500);
}
Serial.println("Wifi connected");
}
void loop() {
// put your main code here, to run repeatedly:
}and you just see a loop of
Wifi connecting...
messages, press the RESET button of your board (or unplug and re-plug its power to reset) and and try again. If you still see just Wifi connecting... messages after trying to reset 5 times, most likely your wifi credentials are wrong or the ESP32 can’t see your Wifi network!
Otherwise, if your ESP32 sometimes connects to the Wifi network almost immediately and sometimes it doesn’t seem to connect at all, use this code instead to automatically reset the ESP32 if it doesn’t connect within 5 seconds:
// Wait for wifi to be connected
uint32_t notConnectedCounter = 0;
while (WiFi.status() != WL_CONNECTED) {
delay(100);
Serial.println("Wifi connecting...");
notConnectedCounter++;
if(notConnectedCounter > 150) { // Reset board if not connected after 15s
Serial.println("Resetting due to Wifi not connecting...");
ESP.restart();
}
}Full example:
#include <Arduino.h>
#include <WiFi.h>
void setup() {
Serial.begin(115200);
WiFi.begin("MyWifiSSID", "MyWifiPassword");
// Wait for wifi to be connected
uint32_t notConnectedCounter = 0;
while (WiFi.status() != WL_CONNECTED) {
delay(100);
Serial.println("Wifi connecting...");
notConnectedCounter++;
if(notConnectedCounter > 150) { // Reset board if not connected after 5s
Serial.println("Resetting due to Wifi not connecting...");
ESP.restart();
}
}
Serial.print("Wifi connected, IP address: ");
Serial.println(WiFi.localIP());
}
void loop() {
// put your main code here, to run repeatedly:
}Alternatively, use this function:
/**
* Wait for WiFi connection, and, if not connected, reboot
*/
void waitForWiFiConnectOrReboot(bool printOnSerial=true) {
uint32_t notConnectedCounter = 0;
while (WiFi.status() != WL_CONNECTED) {
delay(100);
if(printOnSerial) {
Serial.println("Wifi connecting...");
}
notConnectedCounter++;
if(notConnectedCounter > 150) { // Reset board if not connected after 5s
if(printOnSerial) {
Serial.println("Resetting due to Wifi not connecting...");
}
ESP.restart();
}
}
if(printOnSerial) {
// Print wifi IP addess
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
}
